APR34709SP-13

APR34709 SECONDARY SIDE SYNCHRONOUS RECTIFICATION SWITCHER Description Pin Assignments The APR34709 is a secondary side Combo IC, which combines an NChannel MOSFET and a driver circuit designed for Synchronous Rectification (SR), supports DCM and Quasi-Resonant Flyback Topologies. (Top View) NEW PRODUCT The N-Channel MOSFET is optimized for low gate charge, low RDS(ON), fast switching speed and body diode reverse recovery performance. The synchronous rectification can effectively reduce the secondary side rectifier power dissipation and provide high performance solution. By sensing MOSFET drain-to-source voltage, the APR34709 can output ideal drive signal with less external components. It can provide high performance solution for 3.3V to 15V output voltage application. AREF 1 8 GND DRISR 2 7 GND VDD 3 6 VDET VCC 4 5 DRAIN Note: The DRAIN pin of internal MOSFET is exposed PAD, which is at the bottom of IC (the dashed box). The secondary current should flow from GND (pins 7 and 8) to this exposed PAD. The APR34709 is available in SO-8EP package. SO-8EP Features • Synchronous Rectification for DCM Operation Flyback • Eliminate Resonant Ring Interference • Fast Detector of Supply Voltages • Fewest External Components   Applications • Adapters/Chargers for Cell/Cordless Phones, ADSL Modems, MP3 • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Notes: and Other Portable Apparatus Standby and Auxiliary Power Supplies 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain